Pressure-regulator



(No Model.) w v C, DUBOIS.

PRESSURE REGULATOR. No. 400,553. Patented Ap1".2 1889.l

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UNITED STATES CHARLES DUBOIS, OF LEADVILLE, ,COLORADO PRESSURE-REGULATOR.

SPECIFICATION forming part of Letters Patent No. 400,553, dated April 2, 1889. AApplimattion filed October 20,1888. Serial No. 288,679. (No model.)

To all whom it may concern;

Be it, known that I, CHARLES DUBoIs, of

s Leadville, in the county of Lake and State of VTO Colorado, have invented a new and Improved Pressure-Regulator, of which the following is a specification, reference being had to the annexed drawings, forming a part thereof, in which- Figure l is a side elevation of my improved pressure-regulator. Fig. 2 is a longitudinal section taken on line a: a: in Fig. l. Fig. 3 is a transverse section taken on line y y in Fig. 2. Fig. 4 is a sideelevation,partly'in section, of the valve-adjusting cap. Fig. 5 is a side elevation of the valve, showing the packingring in section; and Fig. 6 is aside elevation of the packing-ring. Y

Similar letters of reference indicate corresponding parts in all the views.

The object of my invention is to provide a simple and efficient valve for regulating the pressure of steam or air. l

My invention consists in the combination, with the valve-casing provided with inlet and outlet apertures,`of a hollow piston-valve having a spiral port extending through its walls, a spring arranged to bear upon the pistonvalve, and a valve-operating cap connected with the valve-spindle, all as hereinafter more fully described. y

The casing A, which is of cylindricalform, is made in two diameters, and is divided transversely by a centrally-apertured partition, a, into the chambers h c. The end of the chamber c is closed by a screw-cap, d, in which is inserted the stop-cock e. In the side of the Y casing A is formed an aperture, f, communieating with the chamber c, near one end thereof, and to the chamber c isjfitted a chambered piston-valve, B, which is open at the end adjoining the cap d and closed at the opposite end. In the wall of the valve B is formed a spiral slot, g. yThe parts of the valve separated by the slot are braced by a connectingbar, h. Around the closed end of the valve B is formed a groove, t', in which is inserted a spring-packing, j. The valve B is provided with a shank, k, to which is jointed a square spindle, Z, which extends through the apertured partition a. Between the closed end off the valve B and the partition a is placed a spiral spring, C.

'In the chamber is inserted the cylindrical part m of the cap D. The said cylindrical part m of thev cap is provided with a circumferential groove, n, for receiving the end of the retaining-screw o, which extends through the wall of the casing A, and retains the cap D in its place in the casing. The cap D is provided Y with a rim, p, which extends over the end of thev casing A, and a short distance along the side thereof, and is graduated. rlhe casing A is provided with a mark, q, for convenience in adjusting the cap D.

Steam or air under pressure is admitted through the stop-cock e into the interior of the valve B. The pressure of the steam forces the valve B forward until the spiral groove g is opposite the aperture f, when the steam or air will escape through the said groove or aperture. The amount of pressure required to cause the steam or air to escape from the casing in the manner described depends upon the position of the spiral groove g relative to the aperture f, the position of the groove being adjusted by turning the cap D. Sometimes the pressure is so great that it will carry the slot g of the cylindrical valve completely beyond the aperture f, and a large amount of unnecessary steam or air would be held Within the valve. To obviate this I provide the casing A with a relief-groove, d', for permitting` the escape of air and steam from the body of the casing to the opening f. To provide a further means for carrying off the surplus steam or air, I make a short longitudinal groove, e', in the lower end of the stop-cock e, which groove is adapted to register with a groove, e2, passing partially through the inletpipe, when-the stop-cock is turned in position as shown in Fig. 2. From this it Win be Semi that the unnecessary steam or air will pass upward through the groove e and out throuOh the groove e2; but when the stop-cock is turned at right angles a steam-tight joint is formed.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. ln a regulator, the combination, with the casing A, provided with the head CZ and opening f, of the valve B, having a spiral groove g, adapted to register with the opening f, and the spiral spring C, bearing upon the valve to oppose its forward movement, substantially as shown and described.

IOO

2. In a regulator, the combination of the ber c, the ohalnbered valve B, having the spioasing A, having' the partition a, chambers b rai Slot g, and provided with the packing-ring c, and aperturef, the cap d, closing the ehainj, the spring C, abutting against the partition ber c, the ohanibered valve B, having the spia and resting upon the closed end of the valve r 5 5 rai slot g, the spring C, abutting against the B, the spindle l, and the cap D,provided with partition a and resting upon the closed end of graduations on its periphery, substantially as the valve B, the spindle Z', and the cap D,sub specified.

Santiaily as specified. CHARLES DUBOIS.

3. In a regulator, the combination of the XVitneSSeS: 1o casing A, having,r the partition a, chambers Z) I. C. NVALTER,

c, and aperture f, the cap closing the ehaln- C. P. RUNYON. 

